Sansui BA-F1 Stereo Power Amplifier 110W Differential Serviced Excellent Working

CONDITION

This unit is in excellent condition and works properly, and has been serviced. Old parts have been replaced, mostly the signal capacitors.

ABOUT THIS ITEM

The Sansui BA-F1 is a stereo DC power amplifier produced in Japan from 1979, the flagship of Sansui's acclaimed F1 series alongside the CA-F1 preamplifier. It delivers 110 watts per channel into 8 ohms and 210 watts per channel into 4 ohms, with a frequency response from 1 Hz to 600 kHz. Its signature Diamond Differential circuit and Sansui Custom NM output transistors in a current-differential push-pull configuration define the design, housed in a symmetric monophonic layout with large chimney-type heat sinks and dual power meters with built-in peak indicators.

The power supply uses a large centrally mounted EI transformer with two independent windings and separate rectifier circuits, filtered by four custom 15,000 uF capacitors. Independent left and right input level controls and separate A/B output switches are provided.

Sonically the BA-F1 offers the full-bodied, powerful low end characteristic of late-1970s Sansui designs, with an open top end and a stable, well-defined soundstage.

・Power Supply Voltage: AC 100V, 50/60 Hz (Japanese domestic model). Please use a suitable step-down transformer in 110–240V regions.

— Grape Japan